Rheological behavior of heat-induced actomyosin gels from yellowcheek carp and grass carp

Dynamic rheological behavior of actomyosin from yellowcheek carp (YAM) and grass carp (GAM) during gelling was investigated at different protein concentrations. The viscoelastic properties of YAM and GAM solutions and gels were also studied. Before heating, YAM and GAM solutions exhibited the weak gel-like behavior. After heating and cooling, G' of YAM was much higher than the corresponding value of GAM. During heating and cooling, the G' values of actomyosin showed a strong relationship with protein concentration for both yellowcheek carp and grass carp. The thermal gelation profiles of YAM and GAM solutions were remarkably different. The gelation temperature of actomyosin decreased with the increasing protein concentration. The gelation temperature of GAM exhibited stronger concentration dependence than that of YAM. Enthalpy of gelation reaction of YAM and GAM was 509.2 and 146.6 kJ/mol, respectively.